Hydraulic presses



United States Patent O HYDRAULIC PRESSES Frank C. Wilson, Arcade, N. Y.,assigner to K. R. Wilson, Arcade, N. Y.

Application February 8, 1955, Serial No. 486,754

' 5 Claims. (Cl. 10U-214) My invention relates in general to hydraulicpresses and in particular to an adjustable table for such presses.

As is well known to those skilled in the art, it is necessary to adjustthe height of the table of a hydraulic press in relation to the ramsthereof to accommodate various size workpieces. Since the table of thepresent day press is usually supported by a number of pins carried bythe supporting standard, adjustment is accomplished by adjustingalternate ends of the table by removing onepin at a time or by theremoval of both the pins while the table is supported and adjusted bymeans of a windlass.

The principal object of my invention has been to provide a table whichis adjustably supported by lugs .carried at opposite `sides of the tableand engageable with detents formed .on opposite sides of the frameworkof the machine.k v

Another object has been to provide a table comprising two side platesslidably mounted on a single vertical standard and provided with detentmeans so located that when the table is tilted backwardly from itsworking position, thel detents will become disengaged and the tablemaythen be moved up and down to the desired location.

Another object has been to provide cam means for drawing the table intoworking position after adjustment.'-

Moreover, my device is provided with a windlass attached to the table atsuch a position that when the detents are disengaged from the standard,the table will occupy a position where it can be readily moved up ordown to the desired location.

'Moreoven my table is provided with guide rollers which engage flangescarried 'by the standard, whereby the table is guided in its verticalmovement.

Furthermore, one of the detents carried by the table may be providedwith locking means to hold the table against tilting until the operatoris ready to make the adjustment thereof.

The above. objects and advantages have been accomplished by the deviceshown in the accompanying drawings, of which:

Fig. 1 is a side elevation of a hydraulic press equipped with myimproved table; fg Fig. 2 is an enlarged fragmentary side elevation ithereof; f

1 Fig. 3 is a fragmentary plan view taken on line HI-III of Fig. 2;

Fig. 4 is an enlarged fragmentary view of a modified form of theinvention; and

Fig. 5 is a similar view with the parts in their released positions; g

In the drawings, a hydraulic press is shown which is provided with asingle standard made preferably of I-beam section having a central web11 and opposite anges 12 and 13. The hydraulic cylinder 14 of the pressis carried by side plates 15 secured to the edges of the flanges 12 and13 of the I-beam at the upper end thereof.

Vice

Z The table 20 of my device preferably comprises two plates 21 and 22aranged one on each side of the standard 10 and secured together inspaced relation so as to be freely movable thereon. Over thearea'traversed by the table, the front ange 12 is provided with a seriesof spaced abutments 23, and the back ange 13 is provided.

with a similar series of spaced abutments 24. The table is provided witha front stop 25 which extends across: between the plates and which iscarried at the lower edge thereof. The stop 25 is engageable when moveddown-` wardly with one of the abutments 23. In like manner, a back stop26 is carried near the upper edge of the table plates at the rearthereof and is engageable when moved in an upward direction with theregistering abutment 24. As will be seen by the full line position ofthe table in Figs. 1 and 2, the stops 25 and 26 will be in engagementwith the registering abutments 23 and y24 when the table is in itshorizontal or working position. The stops are preferably inclined awayfrom the adjacent flange so as to bring the engaging faces in firmcontact with the adjacent abutment. The table is drawn to and held inits working position by means of a cam 30, pivotally mounted in one ofthe plates and engageable with the inner face of the rear ange 13. Thecam is actuated by means of a lever 31. When the table is in its workingposition, it will be obvious that any load placed upon the forwardlyprojecting portions of the table plates will be taken by the stops 25and 26 and their engaging abutments.

A suitable windlass 32 is mounted upon the ange 12 of the standard and acable 33 carried' thereby has its' lower end attached to the table at apoint 34 'which is;

located forwardly of the center of gravity of the table..- When the cam30 is released it will permit the rear of the table to move downwardlyas it is Supported 4by the cable- 33 of the windlass thus permitting thetable to assume the position shown in the dot and dash lines of Fig. 2.

Inthis position the stops 25 and 26 are moved away from the adjacentdetents to permit the table to be moved up or down depending upon theadjustment required guided by the rollers 27 and 28 carried by'y one ofthe side plates of the table and engageable with the innerv faces of theflanges 12 and 13. Such movement may be accomplished by the windlass 32.When the table is adjusted to a point opposite the desired position, itcan easily be moved by the operator to a substantially hori-v zontalposition, thus causing the front stop 25 to be' brought inwardly whereit may engage the abutment below it upon further downward movement. Suchpivotal' movement of the table around the front stop 25 will cause therear stop 26 to be brought upwardly to a point of engagement with theregistering abutment 24. This may be accomplished by actuation of thecam30 which will thus lock the table in its adjusted position.

In the modified form of the invention shown in Fig. 4, a tilt lock 35 isshown secured to the back stop 36.

4 This lock is formed as to overlie the adjacent abutment 41 and isformed at its upper end with an inwardly projecting arm 40. The engagingsurfaces of the arm and abutments are inclined outwardly so that the arm40 will clear-v the top surface of the abutment when the front side ofthe table is lifted. During this'movement, the rear I end of the tablepivots or rocks about the engaged stop 41 and supports this end of thetable during such tilting From the foregoing it will be obvious that myinvention provides a very rigid table which may be adjusted verticallywith great Vease and without the necessity of having to withdraw andreplace any movable parts such as pins or the like. Moreover, the tablecannot slip out of .position and fall owing to the fact that it iscontrolled by means of the windlass and is held in position by the stopsand 26 which are engageable with the front and back Allanges of thestandard.

While I have shown a hydraulic press having but a single standard, it isobvious that the table construction may be used on presses having twospaced standards of structural shape and having detents arranged atsimilar positions on opposite standards, whereby when both tables areadjusted tothe same detent, they would be in proper alinement.

What is claimed is:

1. A work support for presses, and the like, comprising an upright, awork supporting table vertically adjustable thereon and having stopsinterengaging with abutments on the upright to hold it in a givenadjustment, said stops being disengageable from said abutments by andupon tilting the table upwardly on the upright for changing theadjustment, and cable means connected to the table ot center andoperable to lift and thereby tilt the table to effect shoulderdisengagement and thereafter to carry it to a new adjustment.

2. A work support for presses and the like, comprising a verticalupright of angular cross section having inner and outer opposedsurfaces, interspaced abutments carried by said upright and disposed onopposite outer surfaces thereof, a work supporting table verticallyadjustable upon said upright and having an upright engaging portion anda work supporting portion, said work supporting portion extendingforwardly of said upright, the upright engaging portion of said tablehaving stops interengaging with said abutments to hold the table in agiven position of adjustment, said stops being disengageable from saidabutments by and upon upward tilting of the work-engaging portion ofsaid table for changing the adjustment of said table, and tableelevating means carried by said upright and arranged at the worksupporting portion thereof, said elevating means being connected to saidtable at the front of said upright and at a point offset from the centerof gravity of said table to cause tilting of said table when lifted bysaid elevating means to affect stop and shoulder disengagement andthereafter to carry said table to a new position of adjustment.

3. A work support for presses and the like, comprising a verticaluprightof angular cross section having inner and outer opposed surfaces,interspaced abutments carried by said upright and disposed on oppositeouter surfaces thereof, a work supporting table vertically adjustableupon said upright and having an upright engaging portion and a worksupporting portion, said work supporting portion extending forwardly ofsaid upright, the upright engaging portion of said table having stopsinterengaging with said abutments to hold the table in a given positionof adjustment, said stops being disengageable from said abutments by andupon upward tilting of the work-engaging portion of said table forchanging the adjustment of said table, table elevating means carried bysaid upright and arranged at the work supporting `portion thereof, saidelevating means being connected to said table at the front of saidupright and at a point offset from the center of gravity of said tableto cause tilting of said table when lifted by said elevating means toaffect stop and shoulder disengagement and thereafter to carry saidtable to a new position of adjustment, and locking means carried by saidtable and engageable with the inner surface of .said upright to causestop and abutment engagement and thereafter to hold said table in fixedposition.

4. A work support for presses and the like, comprising a verticalupright of angular cross section having inner and outer opposedsurfaces, interspaced abutments carried by said upright and disposed onopposite outer surfaces thereof, a work Supporting table verticallyadjustable upon said upright and having an upright engaging portion anda work supporting portion, said work supporting portion extendingforwardly of said upright, the upright engaging portion of said tablehaving stops interengaging with said abutments to hold the table in agiven position of adjustment, said stops being disertgageable from saidabutments by and upon upward tilting of the work-engaging portion ofsaid table for changing the adjustment of said table, guide abutmentscarried by the upright engaging portion of said table and engageablewith the inner opposed surface of said upright, and table elevatingmeans carried 4by said upright and arranged at the work supportingportion thereof, said elevating means being connected to said table atthe front of said upright and at a point offset from the center ofgravity of said table to cause tilting of said table when lifted by saidelevating means to affect stop and shoulder disengagement and thereafterto carry said table to a new position of adjustment.

5. A work support for presses and the like, comprising a verticalupright of angular cross section having inner and outer opposedsurfaces, interspaced abutments carried by said upright and disposed onopposite outer surfaces thereof, a work supporting table verticallyadjustable upon said upright and having an upright engaging portion anda work supporting portion, said work supporting portion extendingforwardly of said upright, the upright engaging portion of said tablehaving stops interengaging with said abutments to hold the table in agiven position of adjustment, said stops being disengageable from saidabutments by and upon upward tilting of the work-engaging portion ofsaid table for changing the adjustment of said table, guide abutmentscarried by the upright engaging portion of said table and engageablewith the inner opposed surfaces of said upright, table elevating meanscarried by said upright and arranged at the work supporting portionthereof, said elevating means being connected to said table at the frontof said upright and at a point offset from the center of gravity of saidtable to cause tilting of said table when lifted by said elevating meansto affect stop and shoulder disengagement and thereafter to carry saidtable to a new position of adjustment, and locking means carried by saidtable and engageable with the inner surface of said upright to causestop and abutment engagement and thereafter to hold the table in fixedposition.

References Cited in the tile of this patent UNITED STATES PATENTS447,526 Plischke et al. Mar. 3, 1891 588,712 Broadbooks Aug. 24, 18971,038,846 Caldwell Sept. 17, 1912 1,042,777 Fernandez Oct. 29, 19121,571,622 Briggs Feb. 2, 1926 1,624,150 Craig Apr. 12, 1927 '2,099,960Johnson Nov. 23, 1937 FOREIGN PATENTS 39,542 Germany May 26, 1887472,498 France Aug. 6, 1914

